Non-Gaussianity after BICEP2

Abstract

We analyze primordial non-Gaussianity in single field inflationary models when the tensor/scalar ratio is large. Our results show that detectable levels of non-Gaussianity $f_{NL}\sim 50$ are still possible in the simplest class of models described by the effective theory of inflation. However, the shape is very tightly constrained, making a sharp prediction that could be confirmed or falsified by a future detection of non-Gaussianity.

5 pages, 2 figures. References and minor clarifications added. Version published in Phys. Rev. Lett

References in corpus (19)

• Non-Gaussian features of primordial fluctuations in single field inflationary models
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• The Effective Field Theory of Inflation
• DBI in the Sky
• Ghost Condensation and a Consistent Infrared Modification of Gravity
• Quasi-Single Field Inflation and Non-Gaussianities
• Ghost Inflation
• Non-Gaussianities in Single Field Inflation and their Optimal Limits from the WMAP 5-year Data
• A Natural Framework for Chaotic Inflation
• Signatures of Supersymmetry from the Early Universe
• An Ignoble Approach to Large Field Inflation
• Trapped Inflation
• Galilean symmetry in the effective theory of inflation: new shapes of non-Gaussianity
• Dissipative effects in the Effective Field Theory of Inflation
• A Naturally Large Four-Point Function in Single Field Inflation
• ${\varphi }^2$ or Not ${\varphi }^2$: Testing the Simplest Inflationary Potential
• Consistency relation for single scalar inflation
• Large-scale anomalies from primordial dissipation
• UV-extending Ghost Inflation

Cited by in corpus (7)

• B-modes and the Nature of Inflation
• Gravitational Waves and the Scale of Inflation
• Monodromy inflation at strong coupling: $4\pi$ in the sky
• On the Three Primordial Numbers
• Constraints on Single-Field Inflation
• B-modes and the sound speed of primordial fluctuations
• Reanalyzing the upper limit on the tensor-to-scalar perturbation ratio r_T in a quartic potential inflationary model